The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 18, 2012
Filed:
Mar. 04, 2005
Joseph A. Luongo, Walpole, MA (US);
John Angelosanto, North Attleboro, MA (US);
Frank Rubino, North Attleboro, MA (US);
Stanley P. Pensak, Jr., East Walpole, MA (US);
David J. First, Carlisle, MA (US);
Jean-pierre Pugnaire, Arlington, MA (US);
Richard R. Venable, Milton, MA (US);
Joseph A. Luongo, Walpole, MA (US);
John Angelosanto, North Attleboro, MA (US);
Frank Rubino, North Attleboro, MA (US);
Stanley P. Pensak, Jr., East Walpole, MA (US);
David J. First, Carlisle, MA (US);
Jean-Pierre Pugnaire, Arlington, MA (US);
Richard R. Venable, Milton, MA (US);
Waters Technologies Corporation, Milford, MA (US);
Abstract
Embodiments of the present invention are directed to method and devices for measuring the pressure of a pump chamber in which no internal opening or connections are needed. One embodiment of the present invention is directed to an apparatus for pumping fluid. The apparatus comprises at least one housing having a transducer surface. The transducer surface has a thickness exhibiting measurable deformation upon the chamber holding a fluid under pressure such that the transducer surface has a first position at which the chamber is at one pressure and a second position at which the chamber is at a second pressure. A strain sensor is affixed to the transducer surface producing; at least one signal upon the transducer surface assuming the first position and at least one signal upon the transducer surface assuming the second position to function as an integrated pressure transducer.